RailsConf 2024 - Look Ma, No Background Jobs: A Peek into the Async Future by Manu J 

Executing a long running task like external API requests in the request-response cycle is guaranteed to bring your Rails app to its knees sooner or later. We have relied on background jobs to offload long running tasks due to this.
But it doesn't always have to be. Learn how you can leverage Falcon and the Async gem to unlock the full potential of ruby fibers and eliminate background jobs for IO-bound tasks and execute them directly with clean, simple, performant and scalable code.